package com.atguigu.lease.web.app.service.impl;



import com.atguigu.lease.common.constant.RedisConstant;
import com.atguigu.lease.common.exception.LeaseException;
import com.atguigu.lease.common.result.ResultCodeEnum;
import com.atguigu.lease.common.utils.JwtUtil;
import com.atguigu.lease.common.utils.VerifyCodeUtil;
import com.atguigu.lease.model.entity.UserInfo;
import com.atguigu.lease.model.enums.BaseStatus;
import com.atguigu.lease.web.app.mapper.UserInfoMapper;
import com.atguigu.lease.web.app.service.LoginService;
import com.atguigu.lease.web.app.service.SmsService;
import com.atguigu.lease.web.app.vo.user.LoginVo;
import com.atguigu.lease.web.app.vo.user.UserInfoVo;
import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.redis.core.StringRedisTemplate;
import org.springframework.stereotype.Service;
import org.springframework.util.StringUtils;

import java.util.concurrent.TimeUnit;

@Service
public class LoginServiceImpl implements LoginService {

    @Autowired
    private StringRedisTemplate redisTemplate;
    @Autowired
    private SmsService smsService;
    @Autowired
    private UserInfoMapper userInfoMapper;


    @Override
    public void getSMSCode(String phone) {
        // 1、检查手机号是否为空
        if (!StringUtils.hasText(phone)) {
            throw new LeaseException(ResultCodeEnum.APP_LOGIN_PHONE_EMPTY);
        }

        // 2、检查Redis中是否已经存在该手机号的key
        String key = RedisConstant.APP_LOGIN_PREFIX + phone;
        boolean isExist = Boolean.TRUE.equals(redisTemplate.hasKey(key));
        if (isExist) {
            Long expire = redisTemplate.getExpire(key, TimeUnit.SECONDS);
            if (RedisConstant.APP_LOGIN_CODE_RESEND_TIME_SEC - expire
                    < RedisConstant.APP_LOGIN_CODE_TTL_SEC) {
                throw new LeaseException(ResultCodeEnum.APP_SEND_SMS_TOO_OFTEN);
            }
        }

        // 3、发送短信，将验证码存入Redis中，设置过期时间
        String verifyCode = VerifyCodeUtil.getVerifyCode(6);
        smsService.sendCode(phone, verifyCode);
        redisTemplate.opsForValue().set(key, verifyCode, RedisConstant.APP_LOGIN_CODE_TTL_SEC, TimeUnit.SECONDS);
    }

    @Override
    public String login(LoginVo loginVo) {
        String phone = loginVo.getPhone();
        String code = loginVo.getCode();
        // 1、检查手机号是否为空
        if (!StringUtils.hasText(phone)) {
            throw new LeaseException(ResultCodeEnum.APP_LOGIN_PHONE_EMPTY);
        }
        // 2、检查验证码是否为空
        if (!StringUtils.hasText(code)) {
            throw new LeaseException(ResultCodeEnum.APP_LOGIN_CODE_EMPTY);
        }
        // 3、判断验证码是否已过期
        String key = RedisConstant.APP_LOGIN_PREFIX + phone;
        String redisCode = redisTemplate.opsForValue().get(key);
        if (redisCode == null) {
            throw new LeaseException(ResultCodeEnum.APP_LOGIN_CODE_EXPIRED);
        }
        // 4、判断验证码是否正确
        if (!redisCode.equals(code)) {
            throw new LeaseException(ResultCodeEnum.APP_LOGIN_CODE_ERROR);
        }
        // 5、判断该手机号用户是否存在，不存在则创建用户
        UserInfo userInfo = userInfoMapper.selectOne(new LambdaQueryWrapper<UserInfo>().eq(UserInfo::getPhone, phone));
        if (userInfo == null) {
            userInfo = new UserInfo();
            userInfo.setPhone(phone);
            userInfo.setStatus(BaseStatus.ENABLE);
            userInfo.setNickname("用户-"+phone.substring(5));
            userInfoMapper.insert(userInfo);
        }
        // 6、判断用户是否被禁用
        if (userInfo.getStatus() == BaseStatus.DISABLE) {
            throw new LeaseException(ResultCodeEnum.APP_ACCOUNT_DISABLED_ERROR);
        }
        // 7、生成token，存入Redis中，设置过期时间
        String token = JwtUtil.createToken(userInfo.getId(), userInfo.getPhone());
        // 8、返回token
        return token;
    }

    @Override
    public UserInfoVo getUserInfoById(Long userId) {
        UserInfo userInfo = userInfoMapper.selectById(userId);
        if (userInfo != null) {
            UserInfoVo userInfoVo = new UserInfoVo(userInfo.getNickname(), userInfo.getAvatarUrl());
            return userInfoVo;
        }
        return null;
    }
}
